Not screws I had in boxes, but screws I have recovered from other projects. I did need to purchase 3 1/4"x4" lag screws for the gate.

Not screws I had in boxes, but screws I have recovered from other projects. I did need to purchase 3 1/4"x4" lag screws for the gate.

Some of those are probably interior screws. I’d replace them if they start rusting to avoid getting rust streaks in the wood, if that matters to you. Way to reuse/recycle!
The fence is 9 years old, and I am in New Mexico, so it is not a huge deal. That said, I only used very few interior screws.